Expansible gqnnectiniq-pln



'(No Model.) H. M. MONTGOMERY.

EXPANSIBLE GONNEUTING PIN.

No. 337,072. v ?atented Mar. 2,1886}.

" witw-coo as (gm DQ14 606 I 5331 Z1! @Ho nmafMQ livsnssis seer Units*rnfrss l n'rnnr illrnlcni HARRY M, MONTGOMERY, OF BOSTGN,MASSAGHUSETTh.

EXFANSiELE JiENNECTlNG FihiV srncirrcnrron olefin-goes 6531mm Patent No.331072. dete'd'N'arch a, wee.

Application filed November 17, 1885. Serial No. 183,146. (No model-l Toall whom it may concern.-

Be it known that I, HARRY M. Mou'rooti- ERY, a citizen of the UnitedStates, residing at Boston, in, the county of Suffolk and State ofMassachusetts, have invented. certain new and useful Improvements inExpansible Connecting-Pius; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it cppertains to make and use thesame, reference being had to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis specification.

The nature and object of my invention will he more readily understoodupon consideration of some of the difficulties which it is in tended toobviate.

irriocomotiv'e' 'zizid'stati'onary'steain engi nes it is extremelyimportant that the correct distance from the center of the cross-headpin to the center of the crank-pinshould be main-- toined at alltimesunchanged. Any alteration of this distance after the engine hasbeen knocking out one of the cylinder-heads.

The usual mode of construction is to make the crank-pin and thecrosshead pin solid, end to provide each end of the connectingrodwith-blesses, strap, and keys to enable all wear of the pins or of thecrosses to be taken up. In setting up the keys for this purpose theeffective length of the connecting-rod is liable to be changed-acircumstance which necessitutescnrei'ul and tedious adjustment andreadjustment of the hrusses and :eys in order to preserve the correctdistunce between crank-pin and cross-heed pin. l urtherniore, the keysin the crosshend end of the connecting-rod are usually dil'licult ofaccess, being situated in the confined space between the walls of thecross-head. This renders their accurate adjustment a matter of much timeand trouble. The same difficulties are experienced in direct actingengines wherein the connecting'rod is pivoted directly to the piston, insome kinds of pumps, and in fact may be said to exist in alheases wheren connecting-rod is used to transmit motion and force.

My invention is intended to obviate these annoyances and to enable theconstruction of connecting-rods to be simplified.

To this end my invention consists of an expansible pin which maybe usedfor connecting together moving parts of machinery oi any kind, but. isespecially adapted for uniting; connecting-rods or pitinen to theircoacting parts. to be dispensed with, since in lieu of theni'the-COIlHGClJlHg'TOdmHY117N 63 a solid end with e holelv drilled through itto receive the expansihle pin. When the bearing wears loose, the pin isexpanded until a close fitis again obtained. As the expansion issubstantially radial the eil'ect-ive length of the connecting-rodremains the sense.

Referring now to the drawings forming it part of this specification,Figure 1 represents the usual construction of the moving parts ofastenn'i-engine, the cross-head being broken away to show the end of theconnecting-rod. Fig. 2 is e crosssectionel view of thecrosshead, takenthrough the connecting-pin, Fig. 3 is a longitudinal sectional view ofmy inn proved expunsihle connecting-pin. .Fig, i is e crossscci-iennlView of the same on line :s y, Fig. 3. Fig. 5 is a perspective view ofthe cxpansible sleeve. Fig. l is a similar vicw of the expending-wedge.

The same letter of reference is used to 5.63- igniite like parts in allthe figures.

A A represent plates or lugs, which us supports for the connecting-pin.Through these plates are drilled holes a a. Between these plntcs'issnugly fitted the hollow pin or sleeve 13, which is separate fronrandindependentof said plates, merely shutting against .lllOlll at each endwithout entering them. This It enables expensive brasses and keys vsleeve is supported solely by the wedge C,

hercinnl'tcr described, and is received within the hearing in nconnecting-rod or the like. The sleeve is split from end to end on oneside, as shown at K. it is cylindrical on its outer its length thecentral hole is tapering; fitted into is the locking" center pinpll;

surface and its innersurface is of such a conJ formation as to enablethe-sleeve to be expandedby suitable devices. For instance, it may,taper gradually from both ends t'o "eoact with-tapering plugs insertedinto 'it.,' I- pre-' fer, however, the construction"' shown ,in" thedrawings, in which one or more cylindrical portions, b I), alternatewith oneor more'frnstoeonical portions, of If] The, number of thesefrusto-conic'al portions may be varied, as desired,.:an d their pitchorslant-can be made so sharp that a moderatelongitudinal nioveme'ntpfthewedge will effect a consider; able expansionof the sleeved Forthe'pnrpose of expanding the sleeve 13, I prefer to-fuse a wedge, G,passing centrally through the same.

and at the smaller end isja similar cylindrical portion fitting the holea. Thisconstrnction' enables the wedge to.'be' moved lengthwise; withoutdestroying its lit in the holes a' a, Between these two cylindricalportionstl'ie wedge C correspcnds in-shapewith the inte' rior of thesleeve B. Thewedgeisprovided with means for adjusting it longitudinally;,I have shown its smaller end extending Beyond; the plate A, andscrew-threaded n'ut',G and lockout G enable it to be-suitably. adjusted,A washer, F, is interposed between unit G and plate A. t J

I also provide means for lockingthe'wedge C to the plates A A whenproperly'adj usted. A hole is drilled through its center from end toend,and it is also split iengthwise along one side, as shown. For agreater portion of and This center pin has suitable means for tight"ening it-such as the nut II and lock-nut H i screwed upon its end andbearing against the end of wedge C. The ciiect of tightening the nuts HH is to expand the wedgeC and cause the cylindrical portions at each endof it to become firmly fixed in the holes a a. A spline or key, E, isdriven into grooves cut in the plates A A, the sleeve B, and the wedge Cto secure these parts in their relative positions, and to resist theirtendency to rotate about the axis of the center pin, D, when in activeservice.

The operation of my device is as follows: W hen it is desired to expandthe connectingpiu, the nuts H H are slackcd up, which loosenstheccnterpin, D, and allows thewedgc C to contract slightly, so as torest loosely in the holes a a. Upon turning up the nuts G 1' the wedge Ois moved lengthwise, expand in; the slcevcB. NVhenthc required degree ofexpansion has been reached, the nuts H. H are tightened, causing thecenter pin, D, tocx' pand the wedge and lock it firmly in place in theplates A A. The several parts are thus iicld compactly and rigidly,forming a strong solid bearing for the connecting-rod. A: the sleeve 13is capable of increased ex I ain aware that a, solid conical pin has Atits 'larger end is acylindrical portion fittingthe holeaiuplute A, I

care by Letters Patent, is- 8";

"the drawings; but I may, modify them somewhat within the scopeo'f'myinveution, Thus, for instance, it may sometimes be advisable tomake the sleeve B or the wedgeO, or both, in morethan one section. Soalso slots and ,keys mayiakfetheplaceof the adjusting-nuts. Only onesupporting-plate vmay be used instead of two.

f 80 been I used for theYpu'rpOSef taking up the v 5 ,wear inconnecting-4nd.brasses, and such I 'do not claim, I

- What I do claim as newyand desire to se- The con binatiom'w'ith a;connecting-rod [and its'coacting 'pajrt, oi' an'expansible pin forjoining'the'm togethenfconsisting of a separate and'itidpendent splitSleeve received solely within the member which sustains the ,wear,ulldjIlQdilS for expanding saidsleeve to fcompensate i it 'the'wear,substantially as: and ,for

the purpose set. forth.

.. a An egtpansible connecting-pin, consisting of lthe 'separate' andindependent .split 9;

sl eve- 13 m combinatioirw ith thewedge O and means for adjusting thesame-,said 'sleeve being supported solely-by said wedgesand capableflof"ncreased, expansion from time t0: time.to'cr the in-pose dl tuhingupwear,'sub-j 0" staniiialiy asshown and described. L, 4 i

T 3. The combination,-;with a supporting plate, of ancxpan'sibleconucctiugpi.n con-, sisting of an enpausibl'e sleeve, B,abutting 'ainst but not entering said plate; ,in' c inbi-p 105 ;ntion'witli suitable means for expanding it, substantially as and for thepurpose set forth.-

ii' il e combination, ,with' a, supporting; plate, of an expansibleconnecting-pin toong sisting of the pin. sleeve B,-abutting.against l iout not entering/said plate, in combination with the wedge O andfmcansfor adjusting said wedge, substantially as andii'o'r the par pose setforth.

5. The combination, with a supporting i s plate, of an expansiblesleeve, 13, and an adjustahle wedge, 0, having one or more irustoconicalportions, Iib, sulrsantiallyas and for the purpose set forth.

6. The combination, with a supporting- 2 plate having an openingtherein, of an we pansiblc sleeve, ii, abutting against but not enteringsaid plate,and an adjustable wedge,

0, having a cylindrical end portion fitting the opening in said plate,substantially as and for 5 the purpose set forth.

7. The combination, with a supportingplatc, of an expansiblc sleeve, B,an adjust able wedge, ('7, and means for locking said wedge to thesupporting-plaie, substantially 3 as and for the purpose set forth.

8. The combination, with the plates A A of the split sleeve B, the splithollow wedge In testimonywhereof Ialfix my signature in 10 G; thetapering center pin,D, and means for presence of two Witnesses.adjusting said wedge and said pin,substantially as and for the purposeset forth.

9. The combination, with plates A A, of l the split sleeve B, the splithollow adjustable i Witnesses: wedge G, the adjustable tapering centerpin, R. S. MOODY,

HARRY Ml MONTQOHERY.

D, and the key E, substantially as and for the l l J AS. P. MANNING.purpose set forth. I

